Release 4.7 drivers/acpi/acpica/nsxfobj.c

/*******************************************************************************
 *
 * Module Name: nsxfobj - Public interfaces to the ACPI subsystem
 *                         ACPI Object oriented interfaces
 *
 ******************************************************************************/

/*
 * Copyright (C) 2000 - 2016, Intel Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */


#define EXPORT_ACPI_INTERFACES

#include <acpi/acpi.h>
#include "accommon.h"
#include "acnamesp.h"


#define _COMPONENT          ACPI_NAMESPACE
ACPI_MODULE_NAME("nsxfobj")

/*******************************************************************************
 *
 * FUNCTION:    acpi_get_type
 *
 * PARAMETERS:  handle          - Handle of object whose type is desired
 *              ret_type        - Where the type will be placed
 *
 * RETURN:      Status
 *
 * DESCRIPTION: This routine returns the type associatd with a particular handle
 *
 ******************************************************************************/


acpi_status acpi_get_type(acpi_handle handle, acpi_object_type *ret_type)
{
	struct acpi_namespace_node *node;
	acpi_status status;

	/* Parameter Validation */

	if (!ret_type) {
		return (AE_BAD_PARAMETER);
	}

	/* Special case for the predefined Root Node (return type ANY) */

	if (handle == ACPI_ROOT_OBJECT) {
		*ret_type = ACPI_TYPE_ANY;
		return (AE_OK);
	}

	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
	if (ACPI_FAILURE(status)) {
		return (status);
	}

	/* Convert and validate the handle */

	node = acpi_ns_validate_handle(handle);
	if (!node) {
		(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
		return (AE_BAD_PARAMETER);
	}

	*ret_type = node->type;

	status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
	return (status);
}

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andy grover
andy grover
117
97.50%
3
50.00%
robert moore
robert moore
2
1.67%
2
33.33%
len brown
len brown
1
0.83%
1
16.67%
Total
120
100.00%
6
100.00%


ACPI_EXPORT_SYMBOL(acpi_get_type)

/*******************************************************************************
 *
 * FUNCTION:    acpi_get_parent
 *
 * PARAMETERS:  handle          - Handle of object whose parent is desired
 *              ret_handle      - Where the parent handle will be placed
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Returns a handle to the parent of the object represented by
 *              Handle.
 *
 ******************************************************************************/

acpi_status acpi_get_parent(acpi_handle handle, acpi_handle *ret_handle)
{
	struct acpi_namespace_node *node;
	struct acpi_namespace_node *parent_node;
	acpi_status status;

	if (!ret_handle) {
		return (AE_BAD_PARAMETER);
	}

	/* Special case for the predefined Root Node (no parent) */

	if (handle == ACPI_ROOT_OBJECT) {
		return (AE_NULL_ENTRY);
	}

	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
	if (ACPI_FAILURE(status)) {
		return (status);
	}

	/* Convert and validate the handle */

	node = acpi_ns_validate_handle(handle);
	if (!node) {
		status = AE_BAD_PARAMETER;
		goto unlock_and_exit;
	}

	/* Get the parent entry */

	parent_node = node->parent;
	*ret_handle = ACPI_CAST_PTR(acpi_handle, parent_node);

	/* Return exception if parent is null */

	if (!parent_node) {
		status = AE_NULL_ENTRY;
	}

unlock_and_exit:

	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
	return (status);
}

Contributors
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CommitProp
andy grover
andy grover
117
84.78%
3
37.50%
alex chiang
alex chiang
13
9.42%
1
12.50%
robert moore
robert moore
4
2.90%
1
12.50%
alexey starikovskiy
alexey starikovskiy
2
1.45%
1
12.50%
len brown
len brown
1
0.72%
1
12.50%
steven cole
steven cole
1
0.72%
1
12.50%
Total
138
100.00%
8
100.00%


ACPI_EXPORT_SYMBOL(acpi_get_parent)

/*******************************************************************************
 *
 * FUNCTION:    acpi_get_next_object
 *
 * PARAMETERS:  type            - Type of object to be searched for
 *              parent          - Parent object whose children we are getting
 *              last_child      - Previous child that was found.
 *                                The NEXT child will be returned
 *              ret_handle      - Where handle to the next object is placed
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Return the next peer object within the namespace. If Handle is
 *              valid, Scope is ignored. Otherwise, the first object within
 *              Scope is returned.
 *
 ******************************************************************************/

acpi_status
acpi_get_next_object(acpi_object_type type,
		     acpi_handle parent,
		     acpi_handle child, acpi_handle *ret_handle)
{
	acpi_status status;
	struct acpi_namespace_node *node;
	struct acpi_namespace_node *parent_node = NULL;
	struct acpi_namespace_node *child_node = NULL;

	/* Parameter validation */

	if (type > ACPI_TYPE_EXTERNAL_MAX) {
		return (AE_BAD_PARAMETER);
	}

	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
	if (ACPI_FAILURE(status)) {
		return (status);
	}

	/* If null handle, use the parent */

	if (!child) {

		/* Start search at the beginning of the specified scope */

		parent_node = acpi_ns_validate_handle(parent);
		if (!parent_node) {
			status = AE_BAD_PARAMETER;
			goto unlock_and_exit;
		}
	} else {
		/* Non-null handle, ignore the parent */
		/* Convert and validate the handle */

		child_node = acpi_ns_validate_handle(child);
		if (!child_node) {
			status = AE_BAD_PARAMETER;
			goto unlock_and_exit;
		}
	}

	/* Internal function does the real work */

	node = acpi_ns_get_next_node_typed(type, parent_node, child_node);
	if (!node) {
		status = AE_NOT_FOUND;
		goto unlock_and_exit;
	}

	if (ret_handle) {
		*ret_handle = ACPI_CAST_PTR(acpi_handle, node);
	}

unlock_and_exit:

	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
	return (status);
}

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andy grover
andy grover
182
96.81%
4
66.67%
robert moore
robert moore
6
3.19%
2
33.33%
Total
188
100.00%
6
100.00%

ACPI_EXPORT_SYMBOL(acpi_get_next_object)
Overall Contributors
Person
Tokens
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Commits
CommitProp
andy grover
andy grover
418
86.54%
5
20.83%
robert moore
robert moore
24
4.97%
8
33.33%
alex chiang
alex chiang
13
2.69%
1
4.17%
len brown
len brown
10
2.07%
3
12.50%
pre-git
pre-git
8
1.66%
1
4.17%
lv zheng
lv zheng
3
0.62%
1
4.17%
alexey starikovskiy
alexey starikovskiy
2
0.41%
1
4.17%
paul gortmaker
paul gortmaker
2
0.41%
1
4.17%
steven cole
steven cole
1
0.21%
1
4.17%
linus torvalds
linus torvalds
1
0.21%
1
4.17%
patrick mochel
patrick mochel
1
0.21%
1
4.17%
Total
483
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24
100.00%
  
Directory: drivers/acpi/acpica

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